This is a 45-45-90 triangle  and the ratios of the sides are 1 : 1 : sqrt2  where sqrt2 is the length of the hypotenuse ( longest side)
So the measure of x = 12 sqrt2  which is the first choice.
        
             
        
        
        
Answer:
D
Step-by-step explanation:
1. calculate the expression
2.multiple reorder
3.remove parenthesis
 
        
             
        
        
        
You're looking for the answers to both X and Y, correct?<span />
        
                    
             
        
        
        
If the dimensions are "nice" factors of the quadratic, and if y > -3, we have
.. area = (y +3)(y +5)
y+5 is greater than y +3, so we take the width to be ....
.. width = y+3